package com.woniuxy01;

/**
 * @author 作者
 * @create 2025-09-04 11:44
 */
public class Test01 {
    public static void main(String[] args) {
        Student s1 = new Student();
//        System.out.println(s1.show());

//        Student s1=null;
        if (s1!=null) {
            System.out.println(s1.show());
        }else{
            System.out.println("s1为null");
        }
    }
}
